From 2c1eaff476156d9d3c7f72396caccca730067d53 Mon Sep 17 00:00:00 2001
From: brunoherbelin <bruno.herbelin@gmail.com>
Date: Sat, 10 Oct 2020 15:30:28 +0200
Subject: [PATCH] improvement in order of delete in selection (for better
 history of delete)

---
 Mixer.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Mixer.cpp b/Mixer.cpp
index a1b55ec..a2556be 100644
--- a/Mixer.cpp
+++ b/Mixer.cpp
@@ -468,8 +468,21 @@ void Mixer::uncover(Source *s)
 
 void Mixer::deleteSelection()
 {
+    // get clones first : this way we store the history of deletion in the right order
+    SourceList selection_clones_;
+    for ( auto sit = selection().begin(); sit != selection().end(); sit++ ) {
+        CloneSource *clone = dynamic_cast<CloneSource *>(*sit);
+        if (clone)
+            selection_clones_.push_back(clone);
+    }
+    // delete all clones
+    while ( !selection_clones_.empty() ) {
+        deleteSource( selection_clones_.front());
+        selection_clones_.pop_front();
+    }
+    // empty the selection
     while ( !selection().empty() )
-        deleteSource( selection().front());
+        deleteSource( selection().front()); // this also remove element from selection()
 
 }